Ok tough situation.......?

my friends and i have been doing this christmas get-together for about 10 years and now that we're 15 we dont hang out with the same people. i mean really, its high school we make new friends and stuff. so this girl that i havent spoken to since last spring and this other girl that i cant stand used to do it with us and really i only like 2 of the girls that i do it with, but those other girls are mad because me and my other friends dont want to do it anymore. i mean its very kiddish and all like we used to bake cookies and give each other ornaments and stuff but i mean some of those girls are all whorish and think they're better than everyone and ignore us but they still want to get together. i think they're only doing it to make their moms think that we still hang out but we dont. so i told them that i didnt want to do it and now they're all mad. what do i do now?